So cute! But pterodactylus isn't a dinosaur... And that's not a pterodactyl either as they aren't typically interpreted as having a crest that extends past the end of their skull. My suggestion? Change the series to 'Mesozoic Archosaurs' or (if you want to include plesiosaurs, mosasaurs, and/or ichthyosaurs) 'Mesozoic Animals'. A quick change to 'P is for pterosaur' and your inaccuracy problem is solved.